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Hand-drawn Diagram

Labeled drawing by Trinkaus of frog in late embryo and tadpole stage, Embryology course, graded A, March 7, 1938
Labeled drawing by Trinkaus of unknown organism embryo, Embryology course, April 24, 1938
Labeled drawing by Trinkaus of 21 hour chick embryo, Embryology course, graded A, March 19, 1938
Labeled drawing by Trinkaus of 23 hour chick embryo, Embryology course, graded A-, March 21, 1938
Labeled drawing by Trinkaus of 24 hour chick embryo, Embryology course, March 20, 1938
Labeled drawing by Trinkaus of frog embryo stages, Embryology course, March 5, 1938
Labeled drawing by Trinkaus of 33 hour chick embryo, Embryology course, with teacher's note, March 21, 1938
Labeled drawing by Trinkaus of 24 hour chick embryo, Embryology course, March 20, 1938
Labeled drawing by Trinkaus of 48 hour chick, Embryology course, April 24, 1938
Labeled drawing by Trinkaus of 96 hour chick embryo, Embryology course, graded B+, May 15, 1938
Labeled drawing by Trinkaus of frog larval stage, Embryology course, note from teacher, graded D, March 13, 1938
Labeled drawing by Trinkaus of frog embryo late cleavage stage, Embryology course, March 6, 1938

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